CN109370030A - The method for preparing agricultural mulching as raw material using automobile-used acoustical cotton leftover bits - Google Patents
The method for preparing agricultural mulching as raw material using automobile-used acoustical cotton leftover bits Download PDFInfo
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- CN109370030A CN109370030A CN201811120344.0A CN201811120344A CN109370030A CN 109370030 A CN109370030 A CN 109370030A CN 201811120344 A CN201811120344 A CN 201811120344A CN 109370030 A CN109370030 A CN 109370030A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G13/00—Protecting plants
- A01G13/02—Protective coverings for plants; Coverings for the ground; Devices for laying-out or removing coverings
- A01G13/0256—Ground coverings
- A01G13/0268—Mats or sheets, e.g. nets or fabrics
- A01G13/0275—Films
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/04—Homopolymers or copolymers of ethene
- C08J2323/08—Copolymers of ethene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2400/00—Characterised by the use of unspecified polymers
- C08J2400/16—Biodegradable polymers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2403/00—Characterised by the use of starch, amylose or amylopectin or of their derivatives or degradation products
- C08J2403/04—Starch derivatives
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2423/10—Homopolymers or copolymers of propene
- C08J2423/12—Polypropene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2467/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2467/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2491/00—Characterised by the use of oils, fats or waxes; Derivatives thereof
- C08J2491/06—Waxes
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K13/00—Use of mixtures of ingredients not covered by one single of the preceding main groups, each of these compounds being essential
- C08K13/06—Pretreated ingredients and ingredients covered by the main groups C08K3/00 - C08K7/00
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/014—Additives containing two or more different additives of the same subgroup in C08K
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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- C08K2201/00—Specific properties of additives
- C08K2201/018—Additives for biodegradable polymeric composition
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/09—Carboxylic acids; Metal salts thereof; Anhydrides thereof
- C08K5/098—Metal salts of carboxylic acids
Abstract
The invention belongs to agricultural mulching preparation technical fields, more particularly to a kind of method for preparing agricultural mulching as raw material using automobile-used acoustical cotton leftover bits, the preparation method includes that automobile-used acoustical cotton leftover bits crush, melt pelletization is handled, low density polyethylene (LDPE), polypropylene and atoleine mixed processing, and be blow molded into after all materials are granulated by screw extruder through inflation film manufacturing machine with a thickness of the mulch of 0.004-0.1mm.Degradable agricultural film of the present invention uses automobile-used acoustical cotton leftover bits as one of raw material, and it joined the substances such as modified tapioca starch, photosensitizer stearic acid cerium powder, hindered phenol type antioxidant and thermal degradation promotor, not only increase the degradable ability of mulch, it is effectively controlled the degradation time of mulch, achieve the effect that degradation, and the cost of production is reduced, reduce white pollution.
Description
Technical field
The invention belongs to agricultural mulching preparation technical fields, and in particular to one kind is using automobile-used acoustical cotton leftover bits as raw material
The method for preparing agricultural mulching.
Background technique
China is a large agricultural country and populous nation, agricultural problem are the grand strategy problems for being related to national economy.Agriculture
It is one of the important material goods of agricultural production with film, agricultural film is the general name of the plastic film applied to agricultural production,
It plays a very important role for moisturizing, the heat preservation of seedtime.Not only have with agricultural mulching covering in agricultural production and protects
The functions such as fertilizer, insect prevention suppression grass, can also keep soil moisture, improve efficiency of water application, while improve crop growth environment, mention
High crop yield and agricultural benefit.Agricultural mulching has become the third-largest means of agricultural production material after agricultural production relaying chemical fertilizer, pesticide
The application of material, ground membrane technology is greatly promoted the raising of farm output and benefit, driven mode of agriculture change and
Agricultural productive force is developed by leaps and bounds.China is a plastic film mulching cultivation big country, by 2005, China's covering with ground sheeting area
Have reached 13,500,000 hectares, mulch usage amount reaches 1,200,000 tons, mulch using covered Xinjiang, Shandong, Shanxi,
The Inner Mongol, Heilungkiang, Shaanxi, the contour cold in Gansu is cool, arid and semi-arid area 40 multiple kinds of crops, and presents and continue
The situation of growth.
But generated discarded film white pollution problems caused by agroecological environment after largely using agricultural mulching
Also it getting worse therewith, common agricultural mulching mostly uses nondegradable polyethylene film, therefore brings many environmental problems,
An important sources of white pollution are not only, great threat also is brought to the sustainable use in arable land.Discarded farming land
Film is generally difficult to recycle, and its residual accumulation will cause soil texture and destroy, be hardened, and the gas permeability of soil is deteriorated, and influences to cultivate.Ground
Over more than 30 years of film large-area applications, the mankind have done many effort, but due to overlay film initial stage to solve the problems, such as used plastic collection
Caused by cover mistake, cause the later period modification mistake when great difficulty so that mulch application in decades, various times of the world
It receives thinking and machinery is all difficult to the problem of residual film pollution is solved perfectly, affect the correct application and large area of film-mulching technique
It promotes, while causing white pollution and the environmental disruption of flood tide.
In order to develop the environment-friend substitution product of non-degradable mulch, grinding for degradable mulch is carried out extensively both at home and abroad
Study carefully.Retrieve relevant document as: with disclosing a kind of double degradation environment protections application No. is the Chinese patent of 201510445118.X
Film and preparation method thereof, the invention are related to a kind of Shuangjing county comprising additive-based degradative plastic film and setting are being added
The compost type degradative plastic film of dosage form degradative plastic film two sides；The invention further relates to its specific formula and preparation method.The invention solution
It is slow that additive-based degradative plastic film of having determined buries native Partial digestion, not environmentally；And compost type degradative plastic film incubation period is short, Wu Faman
The problems such as sufficient crops heat preservation soil moisture conservation requires.For another example, application No. is 201710318883.4 Chinese patents to disclose a kind of drop
The agricultural degradative plastic film and preparation method thereof of time controllably is solved, this method mainly includes that the preparation of premix and blown film two walk greatly
Suddenly, raw material used by the invention preparation method and light stabilizer used by other existing methods, antioxidant compare, degradation suppression
Significant effect processed；Raw material after mixing, blows film forming, blown film temperature is than production common plastics on degradative plastic film Blown-film line
Mulch is 5-8 DEG C low, and the mulch with a thickness of 0.008-0.012mm, growth rhythm of the mulch according to crops, degradation induction tune is made
The control time 45,60,90,120 days.
Degradative plastic film has been done a large amount of as application of the environment protection type functional mulch on corn, peanut, flue-cured tobacco, cotton at present
Research, achieve preferable economic benefit and ecological benefits.But existing degradative plastic film mainly has Biodegradable mulch, light drop
Solve mulch, photoproduction Shuangjing county etc., there are the problem of mainly have at high cost, degradation is not thorough, degradation time is difficult to control etc..
Therefore, the existing generally existing defect of degradative plastic film product, it is difficult to be accepted extensively by peasant.When therefore developing a kind of controlled degradation
Between, degradation thoroughly, low cost degradable mulch to reduce production cost, reduce white pollution, improve soil quality, guarantee make
Produce amount etc. has great importance.
Summary of the invention
The purpose of the present invention is to provide a kind of method for preparing agricultural mulching as raw material using automobile-used acoustical cotton leftover bits,
It prepares the agricultural mulching and uses automobile-used acoustical cotton leftover bits as one of raw material, and joined modified tapioca starch, photosensitizer
The substances such as stearic acid cerium powder, hindered phenol type antioxidant and thermal degradation promotor, not only increase the degradable ability of mulch,
It is effectively controlled the degradation time of mulch, achievees the effect that degradation, and reduces the cost of production, reduces white dirt
Dye.
To achieve the above object, the present invention adopts the following technical scheme:
A method of agricultural mulching is prepared using automobile-used acoustical cotton leftover bits as raw material, which comprises the steps of:
(1) by automobile-used acoustical cotton leftover bits coarse crushing, melting extrusion is carried out by single screw extrusion machine, the material of extrusion is through leading
It stretches, cool down, becoming plastic pellet after pelletizing, it is spare；
(2) 50-55 parts and polypropylene 6-10 parts mixing of linear low density polyethylene are taken according to parts by weight, obtain mixture, so
Afterwards according to mixture: atoleine is added in the mixture and is uniformly mixed for the weight ratio that atoleine is 300:0.8；It is mixed
Close material A；
(3) production obtains in step (1) 40-45 parts of plastic pellet are added in parts by weight in mixed material A；Modified cassava
35-40 parts of starch；5-10 parts of modified nano calcium carbonate；0.05-0.15 parts of cerium powder of photosensitizer stearic acid；Hindered phenol type antioxidant
0.05-0.1 parts；0.3-0.5 parts of thermal degradation promotor；1-2 parts and plasticizer 2-4 parts of expanding material；After being sufficiently mixed uniformly, pass through
Screw extruder is granulated, and the material after granulation is blow molded into the mulch with a thickness of 0.004-0.1mm by inflation film manufacturing machine, is blow molded into
The temperature of film is 150~190 DEG C.
Above-mentioned prepares in the method for agricultural mulching using automobile-used acoustical cotton leftover bits as raw material, the modification para arrowroot
Powder the preparation method comprises the following steps:
(1) tapioca is 2-3 hours dry at 100-120 DEG C, dry tapioca is obtained, then puts tapioca
Enter in ultrasonator ultrasonic vibration 2-3 hours under 80-90MHz, the tapioca being miniaturize:
(2) according to tapioca: water is that the weight ratio of 3:10 pours into water in tapioca, stirs evenly, obtains starch milk；
Then adjusting starch milk with sodium hydroxide solution is alkalinity, and alkalization 30 minutes are stood after stirring；(3) starch milk is put into high-speed stirring
It mixes in machine under 60-70 DEG C, the revolving speed of 2000rpm, the vinyl triethoxyl that weight is log sweet potato starch weight 3-5% is added
The stearic acid that silane and weight are log sweet potato starch weight 0.5-1% is stirred to react 60-90 minutes, uses quality hundred after reaction
Dividing the pH value than the hydrochloric acid solution adjusting material for 10%, modified tapioca starch can be obtained in crushed after being dried to neutrality.
Above-mentioned prepares in the method for agricultural mulching using automobile-used acoustical cotton leftover bits as raw material, the modified Nano carbon
Sour calcium the preparation method comprises the following steps: by nano-calcium carbonate calcium powder in 110~120 DEG C dehydrate, be then added in high-speed mixer,
It stirring and heats up, the chelating titanate coupling agent KR- 201 of nanometer calcium carbonate quality 2.0% is added in 90 DEG C of stopping heating,
90 DEG C of modified 10min；Again one by one be added nanometer calcium carbonate quality 2.0% stearic acid, 0.5% coconut oil and 1% industry it is white
Oil is modified 10min respectively again at 90 DEG C, shuts down, and discharging is ground after drying, crosses 800 mesh screens, obtains modified nano-meter caco 3
Calcium.
The above-mentioned method for preparing agricultural mulching as raw material using automobile-used acoustical cotton leftover bits, the automobile-used acoustical cotton side
Horn scraps are the automobile-used acoustical cotton leftover bits containing PET and PP composite fibre；The thermal degradation promotor is stearic acid manganese powder
End or lauric acid manganese.
The above-mentioned method for preparing agricultural mulching as raw material using automobile-used acoustical cotton leftover bits, the expanding material are maleic acid
Acid anhydride or glycidyl acrylate；The plasticizer is mannitol or ethanol amine.
Cassava is modified in the present invention, sonic oscillation processing first is carried out to tapioca, so that fierceness occurs for starch
And fast-changing mechanical movement, the macromolecular chain of starch in the medium in fluctuation high speed vibration and shearing force
And degrade, cause molecule particles to miniaturize, partial size reduces, and specific surface area increases, and exposes the hydroxyl in starch more, is conducive to
Hydroxyl mutually associates with vinyltriethoxysilane and stearic hydrophilic group used in next step modified-reaction, this hair
It is bright to be modified in the modification of tapioca using vinyltriethoxysilane and stearic acid, starch granules can be made
One layer of lyophobic dust is wrapped up on surface, one layer of fine and close hydrophobic layer is formed, so that starch becomes lipophilic table by hydrophilic surface
Face, so that the modified tapioca starch being prepared has high hydrophobicity matter.There is high hydrophobicity by modified tapioca
Matter can greatly increase tapioca and linear low density polyethylene, polypropylene and the automobile-used sound-absorbing containing PET and PP composite fibre
Compatibility after the blending of cotton leftover bits, enables tapioca uniformly to disperse in the polymer, so that co-mixing system is apparent
Viscosity reduces, and improves loading of the tapioca in whole system, improves the mechanical property and degradation property of entire polymer,
To make tensile strength, elongation percentage and the water resistance of film obtained be improved, degradation property enhancing.
For modified nano calcium carbonate used in the present invention, without modified nanon calcium carbonatefilled in various polymer
Obvious disadvantage is had when middle: first is that surface hydrophilic oleophobic, in polymeric inner bad dispersibility；Second is that being combined with high polymer ontology
Power is poor, has been only capable of compatibilization.Without modified nanometer calcium carbonate surface hydrophilic oleophobic, compatibility and dispersion with polymer
Property is poor, can have an impact to the performance of prepared film when for being filled into entire polymerization system.The present invention pass through by
Nano-calcium carbonate calcium powder is modified to obtain modified nano calcium carbonate, reduces intergranular agglomeration power, increases lipophilicity, improves
The compatibility and dispersibility of calcium carbonate and polymer, enhance chemical affinity, for be filled into linear low density polyethylene,
Polypropylene and automobile-used acoustical cotton leftover bits containing PET and PP composite fibre be blended after polymerization system in, modified Nano carbon
Sour calcium can be uniformly dispersed in entire polymerization system, the compatibility and good dispersion with polymer, improve prepared ground
The quality of film.
The invention has the benefit that
1, the modified tapioca starch used in the present invention, it is biodegradable, it is resourceful, it is cheap, and low density polyethylene (LDPE) exists
Melt-processable is good under high temperature, and the present invention has high hydrophobicity matter by modified tapioca, by that will be modified cassava
After starch is blended with linear low density polyethylene and low density polyethylene (LDPE), tapioca and linear low density polyethylene and low-density
The compatibility of polyethylene is improved, and tapioca can uniformly disperse in the polymer, improves tapioca in whole system
In loading, so that the tensile strength of film obtained and water resistance be made to be improved, degradation property is greatly enhanced.
The present invention accelerates the degradation rate for the mulch being prepared by way of adding modified tapioca starch in the feed, because
By microbial attack, gradually degradation disappears starch, and forms porous destruction structure in the polymer, and polymer surface area is caused to increase
Greatly, to be conducive to the further natural decomposition of polymer.
2, the automobile-used acoustical cotton of the two-component being process by PET and PP has many advantages, such as that sound-absorption coefficient is high, light weight is wide
General use, but its large batch of leftover bits amount for producing not only waste of resource but also generating is big, the present invention can be dropped in preparation
These are used in solution agricultural mulching and contains the automobile-used acoustical cotton leftover bits of PET and PP composite fibre, in can make full use of
The ingredients such as PET and PP that face is contained, the leftover bits for not only making these quantity big are turned waste into wealth, and realize that recycling recycles,
Economize on resources consumption, reduces environmental pollution, and can reduce the cost that the present invention prepares mulch.
3, photosensitizer stearic acid cerium powder is added in the present invention and hindered phenol type antioxidant compound use forms one kind again
Light combination degradation agent, so that an apparent induction period, light degradation in induction period occurs during degradation in manufactured mulch
Slowly, violent light degradation just occurs after induction period, so that the mulch that the present invention is prepared has preferable time control degradability,
Meet the growth needs of crop；And photo-thermal degradation occurs for the compound photodegradable aid and thermal degradation promotor collective effect further
The degradation property for improving mulch.
4, the present invention is prepared degradable using automobile-used acoustical cotton leftover bits as the method that raw material prepares agricultural mulching
Agricultural mulching can satisfy the tensile strength of agricultural mulching and the requirement of elongation at break, degradable, environmentally protective, will not generate
White pollution reduces the pollution to farmland, and this preparation process is simple, and raw material sources are wide, at low cost, is easy to produce in batches.
Specific embodiment
Embodiment 1
A method of agricultural mulching being prepared using automobile-used acoustical cotton leftover bits as raw material, is included the following steps:
(1) by automobile-used acoustical cotton leftover bits coarse crushing, melting extrusion is carried out by single screw extrusion machine, the material of extrusion is through leading
It stretches, cool down, becoming plastic pellet after pelletizing, it is spare；The automobile-used acoustical cotton leftover bits are to contain PET and PP composite fibre
Automobile-used acoustical cotton leftover bits；
(2) 50 parts of linear low density polyethylene and 6 parts of polypropylene mixing are taken according to parts by weight, obtains mixture, then according to
Mixture: atoleine is added in the mixture and is uniformly mixed for the weight ratio that atoleine is 300:0.8；Obtain mixed material
A；
(3) production obtains in step (1) 40 parts of plastic pellet are added in parts by weight in mixed material A；Modified para arrowroot
35 parts of powder；5 parts of modified nano calcium carbonate；0.05 part of powder of photosensitizer stearic acid cerium；0.05 part of hindered phenol type antioxidant；Thermal degradation
Promotor stearic acid manganese powder end or 0.3 part of lauric acid manganese；1 part and 2 parts of plasticizer mannitol of expanding material maleic anhydride；It is sufficiently mixed
It after uniformly, is granulated by screw extruder, the material after granulation is blow molded by inflation film manufacturing machine to the ground with a thickness of 0.004mm
Film, the temperature of Blown Film are 150~190 DEG C.
The modified tapioca starch the preparation method comprises the following steps:
(1) tapioca is 3 hours dry at 100 DEG C, dry tapioca is obtained, tapioca is then put into ultrasound
Interior ultrasonic vibration 3 hours under 80MHz of oscillator, the tapioca being miniaturize:
(2) according to tapioca: water is that the weight ratio of 3:10 pours into water in tapioca, stirs evenly, obtains starch milk；
Then adjusting starch milk with sodium hydroxide solution is alkalinity, and alkalization 30 minutes are stood after stirring；(3) starch milk is put into high-speed stirring
It mixes in machine under 60-70 DEG C, the revolving speed of 2000rpm, the vinyl triethoxyl silicon that weight is log sweet potato starch weight 3% is added
Alkane and weight are the stearic acid of log sweet potato starch weight 1%, are stirred to react 60 minutes, are after reaction 10% with mass percent
Hydrochloric acid solution adjust material pH value to neutrality, modified tapioca starch can be obtained in crushed after being dried.
The modified nano calcium carbonate is done the preparation method comprises the following steps: nano-calcium carbonate calcium powder is dehydrated in 110~120 DEG C
It is dry, it is then added in high-speed mixer, stirs and heat up, the chelating of nanometer calcium carbonate quality 2.0% is added in 90 DEG C of stopping heating
Type titanate coupling agent KR- 201, in 90 DEG C of modified 10min；Again one by one be added nanometer calcium carbonate quality 2.0% stearic acid,
0.5% coconut oil and 1% technical white oil, at 90 DEG C again respectively be modified 10min, shut down, discharging, ground after drying, cross 800
Mesh screen obtains modified nano calcium carbonate.
Embodiment 2
A method of agricultural mulching being prepared using automobile-used acoustical cotton leftover bits as raw material, is included the following steps:
(1) by automobile-used acoustical cotton leftover bits coarse crushing, melting extrusion is carried out by single screw extrusion machine, the material of extrusion is through leading
It stretches, cool down, becoming plastic pellet after pelletizing, it is spare；The automobile-used acoustical cotton leftover bits are to contain PET and PP composite fibre
Automobile-used acoustical cotton leftover bits；
(2) 53 parts of linear low density polyethylene and 8 parts of polypropylene mixing are taken according to parts by weight, obtains mixture, then according to
Mixture: atoleine is added in the mixture and is uniformly mixed for the weight ratio that atoleine is 300:0.8；Obtain mixed material
A；
(3) production obtains in step (1) 42 parts of plastic pellet are added in parts by weight in mixed material A；Modified para arrowroot
38 parts of powder；8 parts of modified nano calcium carbonate；0.1 part of powder of photosensitizer stearic acid cerium；0.08 part of hindered phenol type antioxidant；Thermal degradation
0.4 part of promotor lauric acid manganese；1.5 parts and 3 parts of plasticizer ethanol amine of expanding material glycidyl acrylate；It is sufficiently mixed uniformly
Afterwards, it is granulated by screw extruder, the material after granulation is blow molded into the mulch with a thickness of 0.05mm by inflation film manufacturing machine, be blow molded
The temperature of film forming is 150~190 DEG C.
The modified tapioca starch the preparation method comprises the following steps:
(1) tapioca is 2.5 hours dry at 110 DEG C, dry tapioca is obtained, is then put into tapioca super
Interior ultrasonic vibration 2.5 hours under 85MHz of sonic oscillator, the tapioca being miniaturize:
(2) according to tapioca: water is that the weight ratio of 3:10 pours into water in tapioca, stirs evenly, obtains starch milk；
Then adjusting starch milk with sodium hydroxide solution is alkalinity, and alkalization 30 minutes are stood after stirring；(3) starch milk is put into high-speed stirring
It mixes in machine under 60-70 DEG C, the revolving speed of 2000rpm, the vinyl triethoxyl silicon that weight is log sweet potato starch weight 4% is added
Alkane and weight are the stearic acid of log sweet potato starch weight 0.7%, are stirred to react 80 minutes, are with mass percent after reaction
10% hydrochloric acid solution adjusts the pH value of material to neutrality, and modified tapioca starch can be obtained in crushed after being dried.The modification is received
The preparation method of rice calcium carbonate is consistent in embodiment 1.
Embodiment 3
A method of agricultural mulching being prepared using automobile-used acoustical cotton leftover bits as raw material, is included the following steps:
(1) by automobile-used acoustical cotton leftover bits coarse crushing, melting extrusion is carried out by single screw extrusion machine, the material of extrusion is through leading
It stretches, cool down, becoming plastic pellet after pelletizing, it is spare；The automobile-used acoustical cotton leftover bits are to contain PET and PP composite fibre
Automobile-used acoustical cotton leftover bits；
(2) 55 parts of linear low density polyethylene and 10 parts of polypropylene mixing are taken according to parts by weight, obtains mixture, then according to
Mixture: atoleine is added in the mixture and is uniformly mixed for the weight ratio that atoleine is 300:0.8；Obtain mixed material
A；
(3) production obtains in step (1) 45 parts of plastic pellet are added in parts by weight in mixed material A；Modified para arrowroot
40 parts of powder；10 parts of modified nano calcium carbonate；0.15 part of powder of photosensitizer stearic acid cerium；0.1 part of hindered phenol type antioxidant；Thermal degradation
0.5 part of promotor stearic acid manganese powder end；2 parts and 4 parts of plasticizer mannitol of expanding material maleic anhydride；After being sufficiently mixed uniformly, lead to
Screw extruder granulation is crossed, the material after granulation is blow molded into the mulch with a thickness of 0.1mm by inflation film manufacturing machine, Blown Film
Temperature is 150~190 DEG C.
The modified tapioca starch the preparation method comprises the following steps:
(1) tapioca is 2 hours dry at 120 DEG C, dry tapioca is obtained, tapioca is then put into ultrasound
Interior ultrasonic vibration 2 hours under 90MHz of oscillator, the tapioca being miniaturize:
(2) according to tapioca: water is that the weight ratio of 3:10 pours into water in tapioca, stirs evenly, obtains starch milk；
Then adjusting starch milk with sodium hydroxide solution is alkalinity, and alkalization 30 minutes are stood after stirring；(3) starch milk is put into high-speed stirring
It mixes in machine under 60-70 DEG C, the revolving speed of 2000rpm, the vinyl triethoxyl silicon that weight is log sweet potato starch weight 5% is added
Alkane and weight are the stearic acid of log sweet potato starch weight 0.5%, are stirred to react 90 minutes, are with mass percent after reaction
10% hydrochloric acid solution adjusts the pH value of material to neutrality, and modified tapioca starch can be obtained in crushed after being dried.The modification is received
The preparation method of rice calcium carbonate is consistent in embodiment 1.
Application effect
Agricultural mulching made of the degradable agricultural film and common plastics that the embodiment of the present invention 1 is prepared carries out degradation pair
Than test, the sugarcane field in Laibin city of Guangxi Wuxuan County carries out Degrading experiment, time: from April, 2016 in September, -2016, this hair
The degradation situation of agricultural mulching made of the bright degradable agricultural film and common plastics being prepared is as shown in table 1 below:
The degradable agricultural film that the visible embodiment of the present invention 1 is prepared from upper table 1 has preferable time control degradability, ground
Membrane degradation induction time is 72 days or so, is effectively controlled the degradation time of mulch, meets the rule of plant growth, is trying
It tests mulch after carrying out 72 days and more violent photo-thermal degradation takes place, when test carries out 120 days, mulch of the invention is complete
Degradable, and safety and environmental protection, it is pollution-free, and agricultural mulching made of common plastics is difficult to degrade, and pollutes.
Claims (5)
1. a kind of method for preparing agricultural mulching as raw material using automobile-used acoustical cotton leftover bits, which is characterized in that including walking as follows
It is rapid:
(1) by automobile-used acoustical cotton leftover bits coarse crushing, melting extrusion is carried out by single screw extrusion machine, the material of extrusion is through leading
It stretches, cool down, becoming plastic pellet after pelletizing, it is spare；
(2) 50-55 parts and polypropylene 6-10 parts mixing of linear low density polyethylene are taken according to parts by weight, obtain mixture, so
Afterwards according to mixture: atoleine is added in the mixture and is uniformly mixed for the weight ratio that atoleine is 300:0.8；It is mixed
Close material A；
(3) production obtains in step (1) 40-45 parts of plastic pellet are added in parts by weight in mixed material A；Modified cassava
35-40 parts of starch；5-10 parts of modified nano calcium carbonate；0.05-0.15 parts of cerium powder of photosensitizer stearic acid；Hindered phenol type antioxidant
0.05-0.1 parts；0.3-0.5 parts of thermal degradation promotor；1-2 parts and plasticizer 2-4 parts of expanding material；After being sufficiently mixed uniformly, pass through
Screw extruder is granulated, and the material after granulation is blow molded into the mulch with a thickness of 0.004-0.1mm by inflation film manufacturing machine, is blow molded into
The temperature of film is 150~190 DEG C.
2. the method according to claim 1 for preparing agricultural mulching as raw material using automobile-used acoustical cotton leftover bits, feature
Be, the modified tapioca starch the preparation method comprises the following steps:
(1) tapioca is 2-3 hours dry at 100-120 DEG C, dry tapioca is obtained, then puts tapioca
Enter in ultrasonator ultrasonic vibration 2-3 hours under 80-90MHz, the tapioca being miniaturize:
(2) according to tapioca: water is that the weight ratio of 3:10 pours into water in tapioca, stirs evenly, obtains starch milk；
Then adjusting starch milk with sodium hydroxide solution is alkalinity, and alkalization 30 minutes are stood after stirring；(3) starch milk is put into high-speed stirring
It mixes in machine under 60-70 DEG C, the revolving speed of 2000rpm, the vinyl triethoxyl that weight is log sweet potato starch weight 3-5% is added
The stearic acid that silane and weight are log sweet potato starch weight 0.5-1% is stirred to react 60-90 minutes, uses quality hundred after reaction
Dividing the pH value than the hydrochloric acid solution adjusting material for 10%, modified tapioca starch can be obtained in crushed after being dried to neutrality.
3. the method according to claim 1 for preparing agricultural mulching as raw material using automobile-used acoustical cotton leftover bits, feature
Be, the modified nano calcium carbonate the preparation method comprises the following steps: by nano-calcium carbonate calcium powder in 110~120 DEG C dehydrate,
It is then added in high-speed mixer, stirs and heats up, the chelating type titanium of nanometer calcium carbonate quality 2.0% is added in 90 DEG C of stopping heating
Acid esters coupling agent KR- 201, in 90 DEG C of modified 10min；Again one by one be added nanometer calcium carbonate quality 2.0% stearic acid, 0.5%
Coconut oil and 1% technical white oil, at 90 DEG C again respectively be modified 10min, shut down, discharging, ground after drying, cross 800 meshes
Net obtains modified nano calcium carbonate.
4. the method according to claim 1 for preparing agricultural mulching as raw material using automobile-used acoustical cotton leftover bits, feature
It is, the automobile-used acoustical cotton leftover bits are the automobile-used acoustical cotton leftover bits containing PET and PP composite fibre；The heat
Degradation of promoter is stearic acid manganese powder end or lauric acid manganese.
5. the method according to claim 1 for preparing agricultural mulching as raw material using automobile-used acoustical cotton leftover bits, feature
It is, the expanding material is maleic anhydride or glycidyl acrylate；The plasticizer is mannitol or ethanol amine.
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Cited By (1)
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| CN114059231A (en) * | 2021-09-30 | 2022-02-18 | 河海大学 | Composite fiber felt material and preparation method and application thereof |
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